Author Topic: Using projective capacitive sensing with common keypads  (Read 888 times)

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Offline rcourtney

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Using projective capacitive sensing with common keypads
« on: September 06, 2015, 09:41:33 pm »
I am looking at an attractive case for a protected outdoor keypad.  I don't want to use contact keypad sensing due to environment
deterioration of the carbon button spots.

Has anyone used capacitive sensing using these types of keypads?

Here, the dome and/or finger movement changes the field. 


I don't have the spec on the dome size or distance to the PCB yet.
Also, I may be using a PIC microprocessor.
Any advice is greatly appreciated.

Front view:


Internal enclosure parts:
 


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